Oh dear. Or Trundle which created a sizeable controversy for being a ripoff of a Night Sky. It was even thrown in once that it even goes as far as using the same physics engine. 'cause you know that putting the popular silhouette style together with the popular ball physics puzzle game is truly inspired. -_-

On a sidenote, I hope Night Sky hasn't been abandoned because it looks like it would be an absolutely fantastic game. The dev making it has released a couple other games in the meantime though. I think that bodes poorly for the project. :-\